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-rw-r--r--src/pulse/stream.c1366
1 files changed, 1366 insertions, 0 deletions
diff --git a/src/pulse/stream.c b/src/pulse/stream.c
new file mode 100644
index 00000000..c8fc09d2
--- /dev/null
+++ b/src/pulse/stream.c
@@ -0,0 +1,1366 @@
+/* $Id$ */
+
+/***
+ This file is part of PulseAudio.
+
+ PulseAudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2 of the License,
+ or (at your option) any later version.
+
+ PulseAudio is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with PulseAudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <pulse/def.h>
+#include <pulse/timeval.h>
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/pstream-util.h>
+#include <pulsecore/log.h>
+#include <pulsecore/hashmap.h>
+
+#include "internal.h"
+
+#define LATENCY_IPOL_INTERVAL_USEC (100000L)
+
+pa_stream *pa_stream_new(pa_context *c, const char *name, const pa_sample_spec *ss, const pa_channel_map *map) {
+ pa_stream *s;
+ int i;
+
+ assert(c);
+
+ PA_CHECK_VALIDITY_RETURN_NULL(c, ss && pa_sample_spec_valid(ss), PA_ERR_INVALID);
+ PA_CHECK_VALIDITY_RETURN_NULL(c, !map || (pa_channel_map_valid(map) && map->channels == ss->channels), PA_ERR_INVALID);
+
+ s = pa_xnew(pa_stream, 1);
+ s->ref = 1;
+ s->context = c;
+ s->mainloop = c->mainloop;
+
+ s->read_callback = NULL;
+ s->read_userdata = NULL;
+ s->write_callback = NULL;
+ s->write_userdata = NULL;
+ s->state_callback = NULL;
+ s->state_userdata = NULL;
+ s->overflow_callback = NULL;
+ s->overflow_userdata = NULL;
+ s->underflow_callback = NULL;
+ s->underflow_userdata = NULL;
+ s->latency_update_callback = NULL;
+ s->latency_update_userdata = NULL;
+
+ s->direction = PA_STREAM_NODIRECTION;
+ s->name = pa_xstrdup(name);
+ s->sample_spec = *ss;
+ s->flags = 0;
+
+ if (map)
+ s->channel_map = *map;
+ else
+ pa_channel_map_init_auto(&s->channel_map, ss->channels, PA_CHANNEL_MAP_DEFAULT);
+
+ s->channel = 0;
+ s->channel_valid = 0;
+ s->syncid = c->csyncid++;
+ s->device_index = PA_INVALID_INDEX;
+ s->requested_bytes = 0;
+ s->state = PA_STREAM_UNCONNECTED;
+ memset(&s->buffer_attr, 0, sizeof(s->buffer_attr));
+
+ s->peek_memchunk.index = 0;
+ s->peek_memchunk.length = 0;
+ s->peek_memchunk.memblock = NULL;
+
+ s->record_memblockq = NULL;
+
+ s->previous_time = 0;
+ s->timing_info_valid = 0;
+ s->read_index_not_before = 0;
+ s->write_index_not_before = 0;
+
+ for (i = 0; i < PA_MAX_WRITE_INDEX_CORRECTIONS; i++)
+ s->write_index_corrections[i].valid = 0;
+ s->current_write_index_correction = 0;
+
+ s->corked = 0;
+
+ s->cached_time_valid = 0;
+
+ s->auto_timing_update_event = NULL;
+ s->auto_timing_update_requested = 0;
+
+ /* Refcounting is strictly one-way: from the "bigger" to the "smaller" object. */
+ PA_LLIST_PREPEND(pa_stream, c->streams, s);
+ pa_stream_ref(s);
+
+ return s;
+}
+
+static void stream_free(pa_stream *s) {
+ assert(s && !s->context && !s->channel_valid);
+
+ if (s->auto_timing_update_event) {
+ assert(s->mainloop);
+ s->mainloop->time_free(s->auto_timing_update_event);
+ }
+
+ if (s->peek_memchunk.memblock)
+ pa_memblock_unref(s->peek_memchunk.memblock);
+
+ if (s->record_memblockq)
+ pa_memblockq_free(s->record_memblockq);
+
+ pa_xfree(s->name);
+ pa_xfree(s);
+}
+
+void pa_stream_unref(pa_stream *s) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ if (--(s->ref) == 0)
+ stream_free(s);
+}
+
+pa_stream* pa_stream_ref(pa_stream *s) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ s->ref++;
+ return s;
+}
+
+pa_stream_state_t pa_stream_get_state(pa_stream *s) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ return s->state;
+}
+
+pa_context* pa_stream_get_context(pa_stream *s) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ return s->context;
+}
+
+uint32_t pa_stream_get_index(pa_stream *s) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE, PA_INVALID_INDEX);
+
+ return s->device_index;
+}
+
+void pa_stream_set_state(pa_stream *s, pa_stream_state_t st) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ if (s->state == st)
+ return;
+
+ pa_stream_ref(s);
+
+ s->state = st;
+ if (s->state_callback)
+ s->state_callback(s, s->state_userdata);
+
+ if ((st == PA_STREAM_FAILED || st == PA_STREAM_TERMINATED) && s->context) {
+
+ /* Detach from context */
+ pa_operation *o, *n;
+
+ /* Unref all operatio object that point to us */
+ for (o = s->context->operations; o; o = n) {
+ n = o->next;
+
+ if (o->stream == s)
+ pa_operation_cancel(o);
+ }
+
+ /* Drop all outstanding replies for this stream */
+ if (s->context->pdispatch)
+ pa_pdispatch_unregister_reply(s->context->pdispatch, s);
+
+ if (s->channel_valid)
+ pa_dynarray_put((s->direction == PA_STREAM_PLAYBACK) ? s->context->playback_streams : s->context->record_streams, s->channel, NULL);
+
+ PA_LLIST_REMOVE(pa_stream, s->context->streams, s);
+ pa_stream_unref(s);
+
+ s->channel = 0;
+ s->channel_valid = 0;
+
+ s->context = NULL;
+ }
+
+ pa_stream_unref(s);
+}
+
+void pa_command_stream_killed(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
+ pa_context *c = userdata;
+ pa_stream *s;
+ uint32_t channel;
+
+ assert(pd);
+ assert(command == PA_COMMAND_PLAYBACK_STREAM_KILLED || command == PA_COMMAND_RECORD_STREAM_KILLED);
+ assert(t);
+ assert(c);
+
+ pa_context_ref(c);
+
+ if (pa_tagstruct_getu32(t, &channel) < 0 ||
+ !pa_tagstruct_eof(t)) {
+ pa_context_fail(c, PA_ERR_PROTOCOL);
+ goto finish;
+ }
+
+ if (!(s = pa_dynarray_get(command == PA_COMMAND_PLAYBACK_STREAM_KILLED ? c->playback_streams : c->record_streams, channel)))
+ goto finish;
+
+ pa_context_set_error(c, PA_ERR_KILLED);
+ pa_stream_set_state(s, PA_STREAM_FAILED);
+
+finish:
+ pa_context_unref(c);
+}
+
+void pa_command_request(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
+ pa_stream *s;
+ pa_context *c = userdata;
+ uint32_t bytes, channel;
+
+ assert(pd);
+ assert(command == PA_COMMAND_REQUEST);
+ assert(t);
+ assert(c);
+
+ pa_context_ref(c);
+
+ if (pa_tagstruct_getu32(t, &channel) < 0 ||
+ pa_tagstruct_getu32(t, &bytes) < 0 ||
+ !pa_tagstruct_eof(t)) {
+ pa_context_fail(c, PA_ERR_PROTOCOL);
+ goto finish;
+ }
+
+ if (!(s = pa_dynarray_get(c->playback_streams, channel)))
+ goto finish;
+
+ if (s->state == PA_STREAM_READY) {
+ s->requested_bytes += bytes;
+
+ if (s->requested_bytes > 0 && s->write_callback)
+ s->write_callback(s, s->requested_bytes, s->write_userdata);
+ }
+
+finish:
+ pa_context_unref(c);
+}
+
+void pa_command_overflow_or_underflow(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
+ pa_stream *s;
+ pa_context *c = userdata;
+ uint32_t channel;
+
+ assert(pd);
+ assert(command == PA_COMMAND_OVERFLOW || command == PA_COMMAND_UNDERFLOW);
+ assert(t);
+ assert(c);
+
+ pa_context_ref(c);
+
+ if (pa_tagstruct_getu32(t, &channel) < 0 ||
+ !pa_tagstruct_eof(t)) {
+ pa_context_fail(c, PA_ERR_PROTOCOL);
+ goto finish;
+ }
+
+ if (!(s = pa_dynarray_get(c->playback_streams, channel)))
+ goto finish;
+
+ if (s->state == PA_STREAM_READY) {
+
+ if (command == PA_COMMAND_OVERFLOW) {
+ if (s->overflow_callback)
+ s->overflow_callback(s, s->overflow_userdata);
+ } else if (command == PA_COMMAND_UNDERFLOW) {
+ if (s->underflow_callback)
+ s->underflow_callback(s, s->underflow_userdata);
+ }
+ }
+
+ finish:
+ pa_context_unref(c);
+}
+
+static void request_auto_timing_update(pa_stream *s, int force) {
+ struct timeval next;
+ assert(s);
+
+ if (!(s->flags & PA_STREAM_AUTO_TIMING_UPDATE))
+ return;
+
+ if (s->state == PA_STREAM_READY &&
+ (force || !s->auto_timing_update_requested)) {
+ pa_operation *o;
+
+/* pa_log("automatically requesting new timing data"); */
+
+ if ((o = pa_stream_update_timing_info(s, NULL, NULL))) {
+ pa_operation_unref(o);
+ s->auto_timing_update_requested = 1;
+ }
+ }
+
+ pa_gettimeofday(&next);
+ pa_timeval_add(&next, LATENCY_IPOL_INTERVAL_USEC);
+ s->mainloop->time_restart(s->auto_timing_update_event, &next);
+}
+
+static void invalidate_indexes(pa_stream *s, int r, int w) {
+ assert(s);
+
+/* pa_log("invalidate r:%u w:%u tag:%u", r, w, s->context->ctag); */
+
+ if (s->state != PA_STREAM_READY)
+ return;
+
+ if (w) {
+ s->write_index_not_before = s->context->ctag;
+
+ if (s->timing_info_valid)
+ s->timing_info.write_index_corrupt = 1;
+
+/* pa_log("write_index invalidated"); */
+ }
+
+ if (r) {
+ s->read_index_not_before = s->context->ctag;
+
+ if (s->timing_info_valid)
+ s->timing_info.read_index_corrupt = 1;
+
+/* pa_log("read_index invalidated"); */
+ }
+
+ if ((s->direction == PA_STREAM_PLAYBACK && r) ||
+ (s->direction == PA_STREAM_RECORD && w))
+ s->cached_time_valid = 0;
+
+ request_auto_timing_update(s, 1);
+}
+
+static void auto_timing_update_callback(PA_GCC_UNUSED pa_mainloop_api *m, PA_GCC_UNUSED pa_time_event *e, PA_GCC_UNUSED const struct timeval *tv, void *userdata) {
+ pa_stream *s = userdata;
+
+/* pa_log("time event"); */
+
+ pa_stream_ref(s);
+ request_auto_timing_update(s, 0);
+ pa_stream_unref(s);
+}
+
+void pa_create_stream_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
+ pa_stream *s = userdata;
+
+ assert(pd);
+ assert(s);
+ assert(s->state == PA_STREAM_CREATING);
+
+ pa_stream_ref(s);
+
+ if (command != PA_COMMAND_REPLY) {
+ if (pa_context_handle_error(s->context, command, t) < 0)
+ goto finish;
+
+ pa_stream_set_state(s, PA_STREAM_FAILED);
+ goto finish;
+ }
+
+ if (pa_tagstruct_getu32(t, &s->channel) < 0 ||
+ ((s->direction != PA_STREAM_UPLOAD) && pa_tagstruct_getu32(t, &s->device_index) < 0) ||
+ ((s->direction != PA_STREAM_RECORD) && pa_tagstruct_getu32(t, &s->requested_bytes) < 0)) {
+ pa_context_fail(s->context, PA_ERR_PROTOCOL);
+ goto finish;
+ }
+
+ if (pa_context_get_server_protocol_version(s->context) >= 9) {
+ if (s->direction == PA_STREAM_PLAYBACK) {
+ if (pa_tagstruct_getu32(t, &s->buffer_attr.maxlength) < 0 ||
+ pa_tagstruct_getu32(t, &s->buffer_attr.tlength) < 0 ||
+ pa_tagstruct_getu32(t, &s->buffer_attr.prebuf) < 0 ||
+ pa_tagstruct_getu32(t, &s->buffer_attr.minreq) < 0) {
+ pa_context_fail(s->context, PA_ERR_PROTOCOL);
+ goto finish;
+ }
+ } else if (s->direction == PA_STREAM_RECORD) {
+ if (pa_tagstruct_getu32(t, &s->buffer_attr.maxlength) < 0 ||
+ pa_tagstruct_getu32(t, &s->buffer_attr.fragsize) < 0) {
+ pa_context_fail(s->context, PA_ERR_PROTOCOL);
+ goto finish;
+ }
+ }
+ }
+
+ if (!pa_tagstruct_eof(t)) {
+ pa_context_fail(s->context, PA_ERR_PROTOCOL);
+ goto finish;
+ }
+
+ if (s->direction == PA_STREAM_RECORD) {
+ assert(!s->record_memblockq);
+
+ s->record_memblockq = pa_memblockq_new(
+ 0,
+ s->buffer_attr.maxlength,
+ 0,
+ pa_frame_size(&s->sample_spec),
+ 1,
+ 0,
+ NULL,
+ s->context->memblock_stat);
+ }
+
+ s->channel_valid = 1;
+ pa_dynarray_put((s->direction == PA_STREAM_RECORD) ? s->context->record_streams : s->context->playback_streams, s->channel, s);
+
+ pa_stream_set_state(s, PA_STREAM_READY);
+
+ if (s->direction != PA_STREAM_UPLOAD &&
+ s->flags & PA_STREAM_AUTO_TIMING_UPDATE) {
+ struct timeval tv;
+
+ pa_gettimeofday(&tv);
+ tv.tv_usec += LATENCY_IPOL_INTERVAL_USEC; /* every 100 ms */
+
+ assert(!s->auto_timing_update_event);
+ s->auto_timing_update_event = s->mainloop->time_new(s->mainloop, &tv, &auto_timing_update_callback, s);
+
+ request_auto_timing_update(s, 1);
+ }
+
+ if (s->requested_bytes > 0 && s->ref > 1 && s->write_callback)
+ s->write_callback(s, s->requested_bytes, s->write_userdata);
+
+finish:
+ pa_stream_unref(s);
+}
+
+static int create_stream(
+ pa_stream_direction_t direction,
+ pa_stream *s,
+ const char *dev,
+ const pa_buffer_attr *attr,
+ pa_stream_flags_t flags,
+ const pa_cvolume *volume,
+ pa_stream *sync_stream) {
+
+ pa_tagstruct *t;
+ uint32_t tag;
+
+ assert(s);
+ assert(s->ref >= 1);
+
+ PA_CHECK_VALIDITY(s->context, s->state == PA_STREAM_UNCONNECTED, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, !(flags & ~((direction != PA_STREAM_UPLOAD ?
+ PA_STREAM_START_CORKED|
+ PA_STREAM_INTERPOLATE_TIMING|
+ PA_STREAM_NOT_MONOTONOUS|
+ PA_STREAM_AUTO_TIMING_UPDATE : 0))), PA_ERR_INVALID);
+ PA_CHECK_VALIDITY(s->context, !volume || volume->channels == s->sample_spec.channels, PA_ERR_INVALID);
+ PA_CHECK_VALIDITY(s->context, !sync_stream || (direction == PA_STREAM_PLAYBACK && sync_stream->direction == PA_STREAM_PLAYBACK), PA_ERR_INVALID);
+
+ pa_stream_ref(s);
+
+ s->direction = direction;
+ s->flags = flags;
+
+ if (sync_stream)
+ s->syncid = sync_stream->syncid;
+
+ if (attr)
+ s->buffer_attr = *attr;
+ else {
+ /* half a second */
+ s->buffer_attr.tlength = pa_bytes_per_second(&s->sample_spec)/2;
+ s->buffer_attr.maxlength = (s->buffer_attr.tlength*3)/2;
+ s->buffer_attr.minreq = s->buffer_attr.tlength/100;
+ s->buffer_attr.prebuf = s->buffer_attr.tlength - s->buffer_attr.minreq;
+ s->buffer_attr.fragsize = s->buffer_attr.tlength/100;
+ }
+
+ if (!dev)
+ dev = s->direction == PA_STREAM_PLAYBACK ? s->context->conf->default_sink : s->context->conf->default_source;
+
+ t = pa_tagstruct_command(
+ s->context,
+ s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_CREATE_PLAYBACK_STREAM : PA_COMMAND_CREATE_RECORD_STREAM,
+ &tag);
+
+ pa_tagstruct_put(
+ t,
+ PA_TAG_STRING, s->name,
+ PA_TAG_SAMPLE_SPEC, &s->sample_spec,
+ PA_TAG_CHANNEL_MAP, &s->channel_map,
+ PA_TAG_U32, PA_INVALID_INDEX,
+ PA_TAG_STRING, dev,
+ PA_TAG_U32, s->buffer_attr.maxlength,
+ PA_TAG_BOOLEAN, !!(flags & PA_STREAM_START_CORKED),
+ PA_TAG_INVALID);
+
+ if (s->direction == PA_STREAM_PLAYBACK) {
+ pa_cvolume cv;
+
+ pa_tagstruct_put(
+ t,
+ PA_TAG_U32, s->buffer_attr.tlength,
+ PA_TAG_U32, s->buffer_attr.prebuf,
+ PA_TAG_U32, s->buffer_attr.minreq,
+ PA_TAG_U32, s->syncid,
+ PA_TAG_INVALID);
+
+ if (!volume)
+ volume = pa_cvolume_reset(&cv, s->sample_spec.channels);
+
+ pa_tagstruct_put_cvolume(t, volume);
+ } else
+ pa_tagstruct_putu32(t, s->buffer_attr.fragsize);
+
+ pa_pstream_send_tagstruct(s->context->pstream, t);
+ pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_create_stream_callback, s, NULL);
+
+ pa_stream_set_state(s, PA_STREAM_CREATING);
+
+ pa_stream_unref(s);
+ return 0;
+}
+
+int pa_stream_connect_playback(
+ pa_stream *s,
+ const char *dev,
+ const pa_buffer_attr *attr,
+ pa_stream_flags_t flags,
+ pa_cvolume *volume,
+ pa_stream *sync_stream) {
+
+ assert(s);
+ assert(s->ref >= 1);
+
+ return create_stream(PA_STREAM_PLAYBACK, s, dev, attr, flags, volume, sync_stream);
+}
+
+int pa_stream_connect_record(
+ pa_stream *s,
+ const char *dev,
+ const pa_buffer_attr *attr,
+ pa_stream_flags_t flags) {
+
+ assert(s);
+ assert(s->ref >= 1);
+
+ return create_stream(PA_STREAM_RECORD, s, dev, attr, flags, NULL, NULL);
+}
+
+int pa_stream_write(
+ pa_stream *s,
+ const void *data,
+ size_t length,
+ void (*free_cb)(void *p),
+ int64_t offset,
+ pa_seek_mode_t seek) {
+
+ pa_memchunk chunk;
+
+ assert(s);
+ assert(s->ref >= 1);
+ assert(data);
+
+ PA_CHECK_VALIDITY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, s->direction == PA_STREAM_PLAYBACK || s->direction == PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, seek <= PA_SEEK_RELATIVE_END, PA_ERR_INVALID);
+ PA_CHECK_VALIDITY(s->context, s->direction == PA_STREAM_PLAYBACK || (seek == PA_SEEK_RELATIVE && offset == 0), PA_ERR_INVALID);
+
+ if (length <= 0)
+ return 0;
+
+ if (free_cb)
+ chunk.memblock = pa_memblock_new_user((void*) data, length, free_cb, 1, s->context->memblock_stat);
+ else {
+ chunk.memblock = pa_memblock_new(length, s->context->memblock_stat);
+ memcpy(chunk.memblock->data, data, length);
+ }
+
+ chunk.index = 0;
+ chunk.length = length;
+
+ pa_pstream_send_memblock(s->context->pstream, s->channel, offset, seek, &chunk);
+ pa_memblock_unref(chunk.memblock);
+
+ if (length < s->requested_bytes)
+ s->requested_bytes -= length;
+ else
+ s->requested_bytes = 0;
+
+ if (s->direction == PA_STREAM_PLAYBACK) {
+
+ /* Update latency request correction */
+ if (s->write_index_corrections[s->current_write_index_correction].valid) {
+
+ if (seek == PA_SEEK_ABSOLUTE) {
+ s->write_index_corrections[s->current_write_index_correction].corrupt = 0;
+ s->write_index_corrections[s->current_write_index_correction].absolute = 1;
+ s->write_index_corrections[s->current_write_index_correction].value = offset + length;
+ } else if (seek == PA_SEEK_RELATIVE) {
+ if (!s->write_index_corrections[s->current_write_index_correction].corrupt)
+ s->write_index_corrections[s->current_write_index_correction].value += offset + length;
+ } else
+ s->write_index_corrections[s->current_write_index_correction].corrupt = 1;
+ }
+
+ /* Update the write index in the already available latency data */
+ if (s->timing_info_valid) {
+
+ if (seek == PA_SEEK_ABSOLUTE) {
+ s->timing_info.write_index_corrupt = 0;
+ s->timing_info.write_index = offset + length;
+ } else if (seek == PA_SEEK_RELATIVE) {
+ if (!s->timing_info.write_index_corrupt)
+ s->timing_info.write_index += offset + length;
+ } else
+ s->timing_info.write_index_corrupt = 1;
+ }
+
+ if (!s->timing_info_valid || s->timing_info.write_index_corrupt)
+ request_auto_timing_update(s, 1);
+ }
+
+ return 0;
+}
+
+int pa_stream_peek(pa_stream *s, const void **data, size_t *length) {
+ assert(s);
+ assert(s->ref >= 1);
+ assert(data);
+ assert(length);
+
+ PA_CHECK_VALIDITY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, s->direction == PA_STREAM_RECORD, PA_ERR_BADSTATE);
+
+ if (!s->peek_memchunk.memblock) {
+
+ if (pa_memblockq_peek(s->record_memblockq, &s->peek_memchunk) < 0) {
+ *data = NULL;
+ *length = 0;
+ return 0;
+ }
+ }
+
+ *data = (const char*) s->peek_memchunk.memblock->data + s->peek_memchunk.index;
+ *length = s->peek_memchunk.length;
+ return 0;
+}
+
+int pa_stream_drop(pa_stream *s) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ PA_CHECK_VALIDITY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, s->direction == PA_STREAM_RECORD, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, s->peek_memchunk.memblock, PA_ERR_BADSTATE);
+
+ pa_memblockq_drop(s->record_memblockq, &s->peek_memchunk, s->peek_memchunk.length);
+
+ /* Fix the simulated local read index */
+ if (s->timing_info_valid && !s->timing_info.read_index_corrupt)
+ s->timing_info.read_index += s->peek_memchunk.length;
+
+ pa_memblock_unref(s->peek_memchunk.memblock);
+ s->peek_memchunk.length = 0;
+ s->peek_memchunk.index = 0;
+ s->peek_memchunk.memblock = NULL;
+
+ return 0;
+}
+
+size_t pa_stream_writable_size(pa_stream *s) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE, (size_t) -1);
+ PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->direction != PA_STREAM_RECORD, PA_ERR_BADSTATE, (size_t) -1);
+
+ return s->requested_bytes;
+}
+
+size_t pa_stream_readable_size(pa_stream *s) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE, (size_t) -1);
+ PA_CHECK_VALIDITY_RETURN_ANY(s->context, s->direction == PA_STREAM_RECORD, PA_ERR_BADSTATE, (size_t) -1);
+
+ return pa_memblockq_get_length(s->record_memblockq);
+}
+
+pa_operation * pa_stream_drain(pa_stream *s, pa_stream_success_cb_t cb, void *userdata) {
+ pa_operation *o;
+ pa_tagstruct *t;
+ uint32_t tag;
+
+ assert(s);
+ assert(s->ref >= 1);
+
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->direction == PA_STREAM_PLAYBACK, PA_ERR_BADSTATE);
+
+ o = pa_operation_new(s->context, s, (pa_operation_cb_t) cb, userdata);
+
+ t = pa_tagstruct_command(s->context, PA_COMMAND_DRAIN_PLAYBACK_STREAM, &tag);
+ pa_tagstruct_putu32(t, s->channel);
+ pa_pstream_send_tagstruct(s->context->pstream, t);
+ pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
+
+ return o;
+}
+
+static void stream_get_timing_info_callback(pa_pdispatch *pd, uint32_t command, uint32_t tag, pa_tagstruct *t, void *userdata) {
+ pa_operation *o = userdata;
+ struct timeval local, remote, now;
+ pa_timing_info *i;
+
+ assert(pd);
+ assert(o);
+
+ if (!o->context || !o->stream)
+ goto finish;
+
+ i = &o->stream->timing_info;
+
+/* pa_log("pre corrupt w:%u r:%u\n", !o->stream->timing_info_valid || i->write_index_corrupt,!o->stream->timing_info_valid || i->read_index_corrupt); */
+
+ o->stream->timing_info_valid = 0;
+ i->write_index_corrupt = 0;
+ i->read_index_corrupt = 0;
+
+/* pa_log("timing update %u\n", tag); */
+
+ if (command != PA_COMMAND_REPLY) {
+ if (pa_context_handle_error(o->context, command, t) < 0)
+ goto finish;
+
+ } else if (pa_tagstruct_get_usec(t, &i->sink_usec) < 0 ||
+ pa_tagstruct_get_usec(t, &i->source_usec) < 0 ||
+ pa_tagstruct_get_boolean(t, &i->playing) < 0 ||
+ pa_tagstruct_get_timeval(t, &local) < 0 ||
+ pa_tagstruct_get_timeval(t, &remote) < 0 ||
+ pa_tagstruct_gets64(t, &i->write_index) < 0 ||
+ pa_tagstruct_gets64(t, &i->read_index) < 0 ||
+ !pa_tagstruct_eof(t)) {
+ pa_context_fail(o->context, PA_ERR_PROTOCOL);
+ goto finish;
+
+ } else {
+ o->stream->timing_info_valid = 1;
+
+ pa_gettimeofday(&now);
+
+ /* Calculcate timestamps */
+ if (pa_timeval_cmp(&local, &remote) <= 0 && pa_timeval_cmp(&remote, &now) <= 0) {
+ /* local and remote seem to have synchronized clocks */
+
+ if (o->stream->direction == PA_STREAM_PLAYBACK)
+ i->transport_usec = pa_timeval_diff(&remote, &local);
+ else
+ i->transport_usec = pa_timeval_diff(&now, &remote);
+
+ i->synchronized_clocks = 1;
+ i->timestamp = remote;
+ } else {
+ /* clocks are not synchronized, let's estimate latency then */
+ i->transport_usec = pa_timeval_diff(&now, &local)/2;
+ i->synchronized_clocks = 0;
+ i->timestamp = local;
+ pa_timeval_add(&i->timestamp, i->transport_usec);
+ }
+
+ /* Invalidate read and write indexes if necessary */
+ if (tag < o->stream->read_index_not_before)
+ i->read_index_corrupt = 1;
+
+ if (tag < o->stream->write_index_not_before)
+ i->write_index_corrupt = 1;
+
+ if (o->stream->direction == PA_STREAM_PLAYBACK) {
+ /* Write index correction */
+
+ int n, j;
+ uint32_t ctag = tag;
+
+ /* Go through the saved correction values and add up the total correction.*/
+
+ for (n = 0, j = o->stream->current_write_index_correction+1;
+ n < PA_MAX_WRITE_INDEX_CORRECTIONS;
+ n++, j = (j + 1) % PA_MAX_WRITE_INDEX_CORRECTIONS) {
+
+ /* Step over invalid data or out-of-date data */
+ if (!o->stream->write_index_corrections[j].valid ||
+ o->stream->write_index_corrections[j].tag < ctag)
+ continue;
+
+ /* Make sure that everything is in order */
+ ctag = o->stream->write_index_corrections[j].tag+1;
+
+ /* Now fix the write index */
+ if (o->stream->write_index_corrections[j].corrupt) {
+ /* A corrupting seek was made */
+ i->write_index = 0;
+ i->write_index_corrupt = 1;
+ } else if (o->stream->write_index_corrections[j].absolute) {
+ /* An absolute seek was made */
+ i->write_index = o->stream->write_index_corrections[j].value;
+ i->write_index_corrupt = 0;
+ } else if (!i->write_index_corrupt) {
+ /* A relative seek was made */
+ i->write_index += o->stream->write_index_corrections[j].value;
+ }
+ }
+ }
+
+ if (o->stream->direction == PA_STREAM_RECORD) {
+ /* Read index correction */
+
+ if (!i->read_index_corrupt)
+ i->read_index -= pa_memblockq_get_length(o->stream->record_memblockq);
+ }
+
+ o->stream->cached_time_valid = 0;
+ }
+
+ o->stream->auto_timing_update_requested = 0;
+/* pa_log("post corrupt w:%u r:%u\n", i->write_index_corrupt || !o->stream->timing_info_valid, i->read_index_corrupt || !o->stream->timing_info_valid); */
+
+ /* Clear old correction entries */
+ if (o->stream->direction == PA_STREAM_PLAYBACK) {
+ int n;
+
+ for (n = 0; n < PA_MAX_WRITE_INDEX_CORRECTIONS; n++) {
+ if (!o->stream->write_index_corrections[n].valid)
+ continue;
+
+ if (o->stream->write_index_corrections[n].tag <= tag)
+ o->stream->write_index_corrections[n].valid = 0;
+ }
+ }
+
+ if (o->stream->latency_update_callback)
+ o->stream->latency_update_callback(o->stream, o->stream->latency_update_userdata);
+
+ if (o->callback && o->stream && o->stream->state == PA_STREAM_READY) {
+ pa_stream_success_cb_t cb = (pa_stream_success_cb_t) o->callback;
+ cb(o->stream, o->stream->timing_info_valid, o->userdata);
+ }
+
+finish:
+
+ pa_operation_done(o);
+ pa_operation_unref(o);
+}
+
+pa_operation* pa_stream_update_timing_info(pa_stream *s, pa_stream_success_cb_t cb, void *userdata) {
+ uint32_t tag;
+ pa_operation *o;
+ pa_tagstruct *t;
+ struct timeval now;
+ int cidx = 0;
+
+ assert(s);
+ assert(s->ref >= 1);
+
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
+
+ if (s->direction == PA_STREAM_PLAYBACK) {
+ /* Find a place to store the write_index correction data for this entry */
+ cidx = (s->current_write_index_correction + 1) % PA_MAX_WRITE_INDEX_CORRECTIONS;
+
+ /* Check if we could allocate a correction slot. If not, there are too many outstanding queries */
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, !s->write_index_corrections[cidx].valid, PA_ERR_INTERNAL);
+ }
+ o = pa_operation_new(s->context, s, (pa_operation_cb_t) cb, userdata);
+
+ t = pa_tagstruct_command(
+ s->context,
+ s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_GET_PLAYBACK_LATENCY : PA_COMMAND_GET_RECORD_LATENCY,
+ &tag);
+ pa_tagstruct_putu32(t, s->channel);
+ pa_tagstruct_put_timeval(t, pa_gettimeofday(&now));
+
+ pa_pstream_send_tagstruct(s->context->pstream, t);
+ pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, stream_get_timing_info_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
+
+ if (s->direction == PA_STREAM_PLAYBACK) {
+ /* Fill in initial correction data */
+ o->stream->current_write_index_correction = cidx;
+ o->stream->write_index_corrections[cidx].valid = 1;
+ o->stream->write_index_corrections[cidx].tag = tag;
+ o->stream->write_index_corrections[cidx].absolute = 0;
+ o->stream->write_index_corrections[cidx].value = 0;
+ o->stream->write_index_corrections[cidx].corrupt = 0;
+ }
+
+/* pa_log("requesting update %u\n", tag); */
+
+ return o;
+}
+
+void pa_stream_disconnect_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
+ pa_stream *s = userdata;
+
+ assert(pd);
+ assert(s);
+ assert(s->ref >= 1);
+
+ pa_stream_ref(s);
+
+ if (command != PA_COMMAND_REPLY) {
+ if (pa_context_handle_error(s->context, command, t) < 0)
+ goto finish;
+
+ pa_stream_set_state(s, PA_STREAM_FAILED);
+ goto finish;
+ } else if (!pa_tagstruct_eof(t)) {
+ pa_context_fail(s->context, PA_ERR_PROTOCOL);
+ goto finish;
+ }
+
+ pa_stream_set_state(s, PA_STREAM_TERMINATED);
+
+finish:
+ pa_stream_unref(s);
+}
+
+int pa_stream_disconnect(pa_stream *s) {
+ pa_tagstruct *t;
+ uint32_t tag;
+
+ assert(s);
+ assert(s->ref >= 1);
+
+ PA_CHECK_VALIDITY(s->context, s->channel_valid, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, s->context->state == PA_CONTEXT_READY, PA_ERR_BADSTATE);
+
+ pa_stream_ref(s);
+
+ t = pa_tagstruct_command(
+ s->context,
+ s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_DELETE_PLAYBACK_STREAM :
+ (s->direction == PA_STREAM_RECORD ? PA_COMMAND_DELETE_RECORD_STREAM : PA_COMMAND_DELETE_UPLOAD_STREAM),
+ &tag);
+ pa_tagstruct_putu32(t, s->channel);
+ pa_pstream_send_tagstruct(s->context->pstream, t);
+ pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_disconnect_callback, s, NULL);
+
+ pa_stream_unref(s);
+ return 0;
+}
+
+void pa_stream_set_read_callback(pa_stream *s, pa_stream_request_cb_t cb, void *userdata) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ s->read_callback = cb;
+ s->read_userdata = userdata;
+}
+
+void pa_stream_set_write_callback(pa_stream *s, pa_stream_request_cb_t cb, void *userdata) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ s->write_callback = cb;
+ s->write_userdata = userdata;
+}
+
+void pa_stream_set_state_callback(pa_stream *s, pa_stream_notify_cb_t cb, void *userdata) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ s->state_callback = cb;
+ s->state_userdata = userdata;
+}
+
+void pa_stream_set_overflow_callback(pa_stream *s, pa_stream_notify_cb_t cb, void *userdata) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ s->overflow_callback = cb;
+ s->overflow_userdata = userdata;
+}
+
+void pa_stream_set_underflow_callback(pa_stream *s, pa_stream_notify_cb_t cb, void *userdata) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ s->underflow_callback = cb;
+ s->underflow_userdata = userdata;
+}
+
+void pa_stream_set_latency_update_callback(pa_stream *s, pa_stream_notify_cb_t cb, void *userdata) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ s->latency_update_callback = cb;
+ s->latency_update_userdata = userdata;
+}
+
+void pa_stream_simple_ack_callback(pa_pdispatch *pd, uint32_t command, PA_GCC_UNUSED uint32_t tag, pa_tagstruct *t, void *userdata) {
+ pa_operation *o = userdata;
+ int success = 1;
+
+ assert(pd);
+ assert(o);
+ assert(o->ref >= 1);
+
+ if (!o->context)
+ goto finish;
+
+ if (command != PA_COMMAND_REPLY) {
+ if (pa_context_handle_error(o->context, command, t) < 0)
+ goto finish;
+
+ success = 0;
+ } else if (!pa_tagstruct_eof(t)) {
+ pa_context_fail(o->context, PA_ERR_PROTOCOL);
+ goto finish;
+ }
+
+ if (o->callback) {
+ pa_stream_success_cb_t cb = (pa_stream_success_cb_t) o->callback;
+ cb(o->stream, success, o->userdata);
+ }
+
+finish:
+ pa_operation_done(o);
+ pa_operation_unref(o);
+}
+
+pa_operation* pa_stream_cork(pa_stream *s, int b, pa_stream_success_cb_t cb, void *userdata) {
+ pa_operation *o;
+ pa_tagstruct *t;
+ uint32_t tag;
+
+ assert(s);
+ assert(s->ref >= 1);
+
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
+
+ s->corked = b;
+
+ o = pa_operation_new(s->context, s, (pa_operation_cb_t) cb, userdata);
+
+ t = pa_tagstruct_command(
+ s->context,
+ s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_CORK_PLAYBACK_STREAM : PA_COMMAND_CORK_RECORD_STREAM,
+ &tag);
+ pa_tagstruct_putu32(t, s->channel);
+ pa_tagstruct_put_boolean(t, !!b);
+ pa_pstream_send_tagstruct(s->context->pstream, t);
+ pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
+
+ if (s->direction == PA_STREAM_PLAYBACK)
+ invalidate_indexes(s, 1, 0);
+
+ return o;
+}
+
+static pa_operation* stream_send_simple_command(pa_stream *s, uint32_t command, pa_stream_success_cb_t cb, void *userdata) {
+ pa_tagstruct *t;
+ pa_operation *o;
+ uint32_t tag;
+
+ assert(s);
+ assert(s->ref >= 1);
+
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+
+ o = pa_operation_new(s->context, s, (pa_operation_cb_t) cb, userdata);
+
+ t = pa_tagstruct_command(s->context, command, &tag);
+ pa_tagstruct_putu32(t, s->channel);
+ pa_pstream_send_tagstruct(s->context->pstream, t);
+ pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
+
+ return o;
+}
+
+pa_operation* pa_stream_flush(pa_stream *s, pa_stream_success_cb_t cb, void *userdata) {
+ pa_operation *o;
+
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
+
+ if ((o = stream_send_simple_command(s, s->direction == PA_STREAM_PLAYBACK ? PA_COMMAND_FLUSH_PLAYBACK_STREAM : PA_COMMAND_FLUSH_RECORD_STREAM, cb, userdata))) {
+
+ if (s->direction == PA_STREAM_PLAYBACK) {
+ if (s->write_index_corrections[s->current_write_index_correction].valid)
+ s->write_index_corrections[s->current_write_index_correction].corrupt = 1;
+
+ if (s->timing_info_valid)
+ s->timing_info.write_index_corrupt = 1;
+
+ if (s->buffer_attr.prebuf > 0)
+ invalidate_indexes(s, 1, 0);
+ else
+ request_auto_timing_update(s, 1);
+ } else
+ invalidate_indexes(s, 0, 1);
+ }
+
+ return o;
+}
+
+pa_operation* pa_stream_prebuf(pa_stream *s, pa_stream_success_cb_t cb, void *userdata) {
+ pa_operation *o;
+
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->direction == PA_STREAM_PLAYBACK, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->buffer_attr.prebuf > 0, PA_ERR_BADSTATE);
+
+ if ((o = stream_send_simple_command(s, PA_COMMAND_PREBUF_PLAYBACK_STREAM, cb, userdata)))
+ invalidate_indexes(s, 1, 0);
+
+ return o;
+}
+
+pa_operation* pa_stream_trigger(pa_stream *s, pa_stream_success_cb_t cb, void *userdata) {
+ pa_operation *o;
+
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->direction == PA_STREAM_PLAYBACK, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->buffer_attr.prebuf > 0, PA_ERR_BADSTATE);
+
+ if ((o = stream_send_simple_command(s, PA_COMMAND_TRIGGER_PLAYBACK_STREAM, cb, userdata)))
+ invalidate_indexes(s, 1, 0);
+
+ return o;
+}
+
+pa_operation* pa_stream_set_name(pa_stream *s, const char *name, pa_stream_success_cb_t cb, void *userdata) {
+ pa_operation *o;
+ pa_tagstruct *t;
+ uint32_t tag;
+
+ assert(s);
+ assert(s->ref >= 1);
+ assert(name);
+
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
+
+ o = pa_operation_new(s->context, s, (pa_operation_cb_t) cb, userdata);
+
+ t = pa_tagstruct_command(
+ s->context,
+ s->direction == PA_STREAM_RECORD ? PA_COMMAND_SET_RECORD_STREAM_NAME : PA_COMMAND_SET_PLAYBACK_STREAM_NAME,
+ &tag);
+ pa_tagstruct_putu32(t, s->channel);
+ pa_tagstruct_puts(t, name);
+ pa_pstream_send_tagstruct(s->context->pstream, t);
+ pa_pdispatch_register_reply(s->context->pdispatch, tag, DEFAULT_TIMEOUT, pa_stream_simple_ack_callback, pa_operation_ref(o), (pa_free_cb_t) pa_operation_unref);
+
+ return o;
+}
+
+int pa_stream_get_time(pa_stream *s, pa_usec_t *r_usec) {
+ pa_usec_t usec = 0;
+
+ assert(s);
+ assert(s->ref >= 1);
+
+ PA_CHECK_VALIDITY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, s->timing_info_valid, PA_ERR_NODATA);
+ PA_CHECK_VALIDITY(s->context, s->direction != PA_STREAM_PLAYBACK || !s->timing_info.read_index_corrupt, PA_ERR_NODATA);
+ PA_CHECK_VALIDITY(s->context, s->direction != PA_STREAM_RECORD || !s->timing_info.write_index_corrupt, PA_ERR_NODATA);
+
+ if (s->cached_time_valid)
+ /* We alredy calculated the time value for this timing info, so let's reuse it */
+ usec = s->cached_time;
+ else {
+ if (s->direction == PA_STREAM_PLAYBACK) {
+ /* The last byte that was written into the output device
+ * had this time value associated */
+ usec = pa_bytes_to_usec(s->timing_info.read_index < 0 ? 0 : (uint64_t) s->timing_info.read_index, &s->sample_spec);
+
+ if (!s->corked) {
+ /* Because the latency info took a little time to come
+ * to us, we assume that the real output time is actually
+ * a little ahead */
+ usec += s->timing_info.transport_usec;
+
+ /* However, the output device usually maintains a buffer
+ too, hence the real sample currently played is a little
+ back */
+ if (s->timing_info.sink_usec >= usec)
+ usec = 0;
+ else
+ usec -= s->timing_info.sink_usec;
+ }
+
+ } else if (s->direction == PA_STREAM_RECORD) {
+ /* The last byte written into the server side queue had
+ * this time value associated */
+ usec = pa_bytes_to_usec(s->timing_info.write_index < 0 ? 0 : (uint64_t) s->timing_info.write_index, &s->sample_spec);
+
+ if (!s->corked) {
+ /* Add transport latency */
+ usec += s->timing_info.transport_usec;
+
+ /* Add latency of data in device buffer */
+ usec += s->timing_info.source_usec;
+
+ /* If this is a monitor source, we need to correct the
+ * time by the playback device buffer */
+ if (s->timing_info.sink_usec >= usec)
+ usec = 0;
+ else
+ usec -= s->timing_info.sink_usec;
+ }
+ }
+
+ s->cached_time = usec;
+ s->cached_time_valid = 1;
+ }
+
+ /* Interpolate if requested */
+ if (s->flags & PA_STREAM_INTERPOLATE_TIMING) {
+
+ /* We just add the time that passed since the latency info was
+ * current */
+ if (!s->corked) {
+ struct timeval now;
+ usec += pa_timeval_diff(pa_gettimeofday(&now), &s->timing_info.timestamp);
+ }
+ }
+
+ /* Make sure the time runs monotonically */
+ if (!(s->flags & PA_STREAM_NOT_MONOTONOUS)) {
+ if (usec < s->previous_time)
+ usec = s->previous_time;
+ else
+ s->previous_time = usec;
+ }
+
+ if (r_usec)
+ *r_usec = usec;
+
+ return 0;
+}
+
+static pa_usec_t time_counter_diff(pa_stream *s, pa_usec_t a, pa_usec_t b, int *negative) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ if (negative)
+ *negative = 0;
+
+ if (a >= b)
+ return a-b;
+ else {
+ if (negative && s->direction == PA_STREAM_RECORD) {
+ *negative = 1;
+ return b-a;
+ } else
+ return 0;
+ }
+}
+
+int pa_stream_get_latency(pa_stream *s, pa_usec_t *r_usec, int *negative) {
+ pa_usec_t t, c;
+ int r;
+ int64_t cindex;
+
+ assert(s);
+ assert(s->ref >= 1);
+ assert(r_usec);
+
+ PA_CHECK_VALIDITY(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY(s->context, s->timing_info_valid, PA_ERR_NODATA);
+ PA_CHECK_VALIDITY(s->context, s->direction != PA_STREAM_PLAYBACK || !s->timing_info.write_index_corrupt, PA_ERR_NODATA);
+ PA_CHECK_VALIDITY(s->context, s->direction != PA_STREAM_RECORD || !s->timing_info.read_index_corrupt, PA_ERR_NODATA);
+
+ if ((r = pa_stream_get_time(s, &t)) < 0)
+ return r;
+
+ if (s->direction == PA_STREAM_PLAYBACK)
+ cindex = s->timing_info.write_index;
+ else
+ cindex = s->timing_info.read_index;
+
+ if (cindex < 0)
+ cindex = 0;
+
+ c = pa_bytes_to_usec(cindex, &s->sample_spec);
+
+ if (s->direction == PA_STREAM_PLAYBACK)
+ *r_usec = time_counter_diff(s, c, t, negative);
+ else
+ *r_usec = time_counter_diff(s, t, c, negative);
+
+ return 0;
+}
+
+const pa_timing_info* pa_stream_get_timing_info(pa_stream *s) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->timing_info_valid, PA_ERR_BADSTATE);
+
+ return &s->timing_info;
+}
+
+const pa_sample_spec* pa_stream_get_sample_spec(pa_stream *s) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ return &s->sample_spec;
+}
+
+const pa_channel_map* pa_stream_get_channel_map(pa_stream *s) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ return &s->channel_map;
+}
+
+const pa_buffer_attr* pa_stream_get_buffer_attr(pa_stream *s) {
+ assert(s);
+ assert(s->ref >= 1);
+
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->state == PA_STREAM_READY, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context, s->direction != PA_STREAM_UPLOAD, PA_ERR_BADSTATE);
+ PA_CHECK_VALIDITY_RETURN_NULL(s->context,
+ pa_context_get_server_protocol_version(s->context) >= 9, PA_ERR_NODATA);
+
+ return &s->buffer_attr;
+}
generated by cgit (git 2.34.1) at 2024-11-15 14:12:12 +0000